On the allowed foods, may I suggest that you add:
Sesame seeds - Protein 18.2g, Carbohydrate 0.9g, Fat 58g
Pure, undiluted Tahini - Protein 25.0g, Carbohydrate 9.7g, Fat 60.0g - but you dilute it to make the sauce, so the carb count is much lower.
Pine seeds (aka pine nuts, pine kernels) - Protein 14g, Carbohydrate 4g, Fat 68.6g
Biltong. Different makes have different added ingredients. My favourite is "Laverstoke Park Farm" - Protein 44g, Carbohydrate 1.7g, Fat 8.5g because it has the fewest added ingredients, no added rubbish, and nicest flavour and texture. But it's not easy to get hold of. Next best IMO is
"Unearthed" - Protein 48.5g, Carbohydrate 1.1g, Fat 6.3g
And for drinking, if you really miss sweetness, try Pukka Peppermint and Licorice, or Tea Pigs Licorice and Peppermint. They are naturally sweet, with the same smooth mouth-feel that sugar gives. They are expensive, but the bags are very strong (too strong for a regular mug, IMO) and I generally make at least 2 cups from each bag.